import router from './router'
import { useUserStore } from '@/store/user'
import { usePermissionStore } from '@/store/permission'
import { ElMessage } from 'element-plus'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from './utils/storage' // get token from cookie
import getPageTitle from './utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login', '/auth-redirect'] // no redirect whitelist

router.beforeEach(async (to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  const userStore = useUserStore()

  const permissionStore = usePermissionStore()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done() // 
    } else {
      const hasRoles = userStore.roles && userStore.roles.length > 0

      if (hasRoles) {
        next()
      } else {
        try {
          // get user info
          // note: roles must be a object array! such as: ['admin'] or ,['developer','editor']
          // 第三步 每次刷新的时候获取用户权限信息以及路由信息 
          const { roles, routes } = await userStore.getInfo();
          console.log(routes);
          // generate accessible routes map based on roles
          // 第四步 生成最终路由
          const accessRoutes = await permissionStore.generateRoutes({
            roles,
            routes
          })
          // 第七步 vue-router 添加 用户可访问的路由;动态生成路由
          accessRoutes.forEach((route) => {
            router.addRoute(route)
          })

          // hack method to ensure that addRoutes is complete
          // set the replace: true, so the navigation will not leave a history record
          next({ ...to, replace: true })
        } catch (error) {
          // remove token and go to login page to re-login
          await userStore.resetToken()
          ElMessage.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
